We can debate about that. I had really strange experience with some projects in the past. For example when i first got into prototypes. One of the most bizarre and strange concepts worked, i talk about concepts that had 98% chance of failure. And the ones that had every calculation positive failed in the test field. Even in science there are some strange events that no one can predict. And that's why everything should be tested. The good thing is that in this field we don't involve passion or hopes...most of the time. And that's actually good, i would like to see more people using the scientific method. Not just relying on luck or fortune or whatever. :)
Yeah, life sometimes is a paradox. ☺